1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/docs/COPYING.txt Mon Jan 23 15:12:06 2023 +0100
1.3 @@ -0,0 +1,79 @@
1.4 +Licence Agreement for AcornElectronKeyboard
1.5 +-------------------------------------------
1.6 +
1.7 +Copyright (C) 2022, 2023 Paul Boddie <paul@boddie.org.uk>
1.8 +
1.9 +This program is free software; you can redistribute it and/or modify it under
1.10 +the terms of the GNU General Public License as published by the Free Software
1.11 +Foundation; either version 3 of the License, or (at your option) any later
1.12 +version.
1.13 +
1.14 +This program is distributed in the hope that it will be useful, but WITHOUT
1.15 +ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
1.16 +FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
1.17 +details.
1.18 +
1.19 +You should have received a copy of the GNU General Public License along with
1.20 +this program. If not, see <http://www.gnu.org/licenses/>.
1.21 +
1.22 +Acknowledgements
1.23 +----------------
1.24 +
1.25 +The information provided in various forms within this distribution is based on
1.26 +the circuit diagram previously published in the following book:
1.27 +
1.28 +Adrian C. Dickens, Mark A. Holmes, "The Advanced User Guide for the Acorn
1.29 +Electron", Acornsoft/Adder Publishing, ISBN 0947929037
1.30 +
1.31 +Of specific relevance is the following statement from that publication:
1.32 +
1.33 +"The Authors gratefully acknowledge Acorn Computers Limited for their kind
1.34 +permission to reproduce the complete Electron circuit diagram."
1.35 +
1.36 +The revised version of the Advanced User Guide undertaken by the community
1.37 +also includes the following notes of relevance:
1.38 +
1.39 +"Third edition Jan 2019, by stardot.org.uk members. Revised diagrams based on
1.40 +those drawn by C. Dewhurst."
1.41 +
1.42 +Thanks are also due to John Simpson for his continued work on revising the
1.43 +Advanced User Guide, including the circuit diagram, over many years.
1.44 +
1.45 +Notes on the licence choice and its application to this work
1.46 +------------------------------------------------------------
1.47 +
1.48 +Although the above statement refers to a "program", the licence itself uses
1.49 +this term to refer to "any copyrightable work". In this case, the work
1.50 +consists of schematics, circuit layout details and other data, and the
1.51 +application of this licence is intended to govern the further distribution of
1.52 +these materials in addition to any programs or software that might also be
1.53 +included in the work.
1.54 +
1.55 +When making hardware using the materials featured in this work, be sure to
1.56 +provide corresponding sources (schematics, circuit layouts) or to make them
1.57 +available on request, as indicated by the licence terms. Where a modified form
1.58 +of the work is distributed, the relevant changes must be incorporated into the
1.59 +source files that were actually edited to produce the desired, modified
1.60 +result.
1.61 +
1.62 +It is not generally acceptable to provide only modified output files when
1.63 +distributing modified forms of this work. For example, it is not acceptable to
1.64 +change the circuit layout file in a PCB editing program and then withhold this
1.65 +modified file from recipients by insisting that only the Gerber files were
1.66 +edited directly. Only if the Gerber files were actually edited directly may
1.67 +modified versions of such files be considered source-level changes. Even then,
1.68 +such modifications on files that are the product of other, more abstract,
1.69 +files are not recommended as they rarely uphold a sustainable development
1.70 +approach.
1.71 +
1.72 +To conclude, when producing unmodified versions of this work, you should make
1.73 +these materials available to recipients. When producing modified versions, you
1.74 +should make the exact materials you used available to recipients.
1.75 +
1.76 +You should preserve the copyright and licensing notices present in this work
1.77 +regardless of any modifications you make to the work. However, where a
1.78 +copyright notice appears on the hardware itself (being analogous to a message
1.79 +that a program might display to communicate such information to its users), you
1.80 +may choose to extend the notice to take your modifications into account, or you
1.81 +may choose to replace it with a reference to a resource providing all
1.82 +applicable copyright and licensing information.